Off-by-one Error Affecting kernel-uek-devel package, versions <0:5.15.0-303.171.5.2.el8uek


Severity

Recommended
0.0
high
0
10

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-ORACLE8-KERNELUEKDEVEL-8538440
  • published20 Dec 2024
  • disclosed27 Sept 2024

Introduced: 27 Sep 2024

CVE-2024-46852  (opens in a new tab)
CWE-193  (opens in a new tab)

How to fix?

Upgrade Oracle:8 kernel-uek-devel to version 0:5.15.0-303.171.5.2.el8uek or higher.
This issue was patched in ELSA-2024-12887.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uek-devel package and not the kernel-uek-devel package as distributed by Oracle. See How to fix? for Oracle:8 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

dma-buf: heaps: Fix off-by-one in CMA heap fault handler

Until VM_DONTEXPAND was added in commit 1c1914d6e8c6 ("dma-buf: heaps: Don't track CMA dma-buf pages under RssFile") it was possible to obtain a mapping larger than the buffer size via mremap and bypass the overflow check in dma_buf_mmap_internal. When using such a mapping to attempt to fault past the end of the buffer, the CMA heap fault handler also checks the fault offset against the buffer size, but gets the boundary wrong by

  1. Fix the boundary check so that we don't read off the end of the pages array and insert an arbitrary page in the mapping.

CVSS Scores

version 3.1